Magazine hammer



Oct. 20, 1936. 3 M, COFFMAN 2,057,818 I MAGAZINE HAMMER Filed Dec. 24, 1934 ATTORNEY.

Patented Oct. 20, 1936 PATENT OFFICE MAGAZINE HAMlI/[ER Samuel M. Cofiman, Kansas City, Mo., assignor of one-third to Walter S. Harriman, Kansas City, Mo.

Application December 24, 1934, Serial No. 758,887

20 Claims.

My invention relates to a magazine hammer and one object is to provide a device of this character with an oscillatory magnetic head, a magazine adapted to hold a supply of tacks, nails, or

- like elements, and mechanism whereby the elements may be fed one by one as needed to the driving face of said magnetic head preparatory to being driven thereby.

The handle of the hammer is preferably of hollow formation to provide a sheath for the magazine which is removable so that it can be readily loaded and then replaced within said handle. The magazine is provided with one or more conveyers for receiving the elements and carrying them forward into the magnetic field of the head when the latter is in position to receive them.

When more than one conveyer is employed they are preferably arranged side by side and one may be loaded with one type and size of elements and another with a diiierent type and size. Means are provided for shifting the magazine laterally to carry any conveyer approximately into aline ment with the magnetic head when the same is in position to receive the elements from the alined conveyer.

With a tool of this character a large number of tacks, nails, or the like may be driven within a short period of time, thereby rendering the tool especially desirable for use in many of the arts, such, for instance, as upholstering, window dressing, card hanging, roof shingling, etc.

In order that the invention may be fully understood, reference will now be had to the accompanying drawing, in which:

Fig. 1 is a longitudinal sectional view of the hammer with the magazine enclosed in the handle thereof.

Fig. 2 is a side elevation, partly in section showing the head of the hammer and the magazine in position for removing a tack, nail, or the like, from the magazine.

Fig. 3 is an irregular longitudinal section on line 3.3 of Fig. 1.

Fig. 4 is a detail rear elevation of the head of r the hammer.

Fig. 5 is an enlarged cross sectional view of the magazine, taken on line '5 of Fig. 1.

Fig. 6 is a broken plan view, partly in section, of the magazine and two endless conveyers which latter are operably mounted within the former.

Fig. 7 is a broken detail perspective view of one of the endless conveyers removed from the magazine.

Fig. 8 is a fragmentary plan view of the magazine and a portion of the means for shifting the same laterally.

Fig. 9 is a fragmentary plan view of the hammer handle with a transverse slot in the top wall thereof for cooperating with the shifting means in holding the latter in any of its various positions.

In carrying out the invention I employ a hammer comprising a tubular handle 2 and a head 4, which latter is rockably mounted upon a pivot 6 so that it may swing either to the driving position shown by Fig. 1, or to the receiving position shown by Fig. 2. The pivot 6 is secured to the bifurcated forward portion 8 of said tubular handle 2. One end of the head 4 is bifurcated as indicated at I0 and magnetized for drawing, tacks, nails or other like elements from the forward end of a magazine I2 which is removably mounted in the hollow handle 2.

Normally the magnetic head 4 is held in driving position by means of a latch I4, a pin I6, and a retractile spring 34. The pin I6 is fixed to the magnetic head 4 and projects into a cavity I8 in the upper rear portion of said magnetic head. The latch I4 is manually controlled through a thumb-piece 20 and mounted upon a pivot 22 carried by a member 24 fixed to the upper wall of the handle 2. The hook-shaped forward terminal of the latch I4 is yieldably held in engagement with the pin I6 by means of a spring 26 interposed between the latch I4 and the member 24.

In addition to the latch I4 cooperating with the pin I6 and the spring 34 in holding the magnetic head 4 in driving position, said latch also cooperates with a link 28 in swinging the magnetic head to receiving position where it is approximately in line with the central longitudinal porton of the magazine I2 for the purpose of withdrawing a tack, nail, or other element A from said magazine. The link 28 is operably connected at its upper end to the latch I4 by a pivot 30 and operably connected at its lower end to the magnetic head 4 by a pin-and-slot connection 32 which permits the latch I4 to move upwardly and clear the pin I6 before the link 28 begins to rock the magnetic head 4 to receiving position. The coil spring 34 is connected at its rear end to the handle 2 by a stud 36, Fig. 3, and at its forward end to the magnetic head 4 by a stud 38 and serves to return said magnetic head to driving position when the thumb-piece 20 is relieved of downward pressure by the operator.

The entrance at the rear end of the handle 2 is provided with a door 40 for holding the magazine I2 within said handle. The upper end of the door 40 is provided with trunnions 42 rockably mounted in the adjacent sides of the handle 2 and said door 48 is normally secured in closed ,position by means of a bolt 44 yieldably held in active position by a coil spring 46.

The magazine I2 comprises a casing 48 in which one or more endless belts or conveyers 58 are operably mounted. In the present instance I have shown two conveyers 58 arranged side by side, Figs. 5 and 6, and each having a row of equally spaced perforations 52 for the reception of elements A. The conveyers 58 are arranged to travel in a circuit on slideways 54 formed on the side walls of the casing 48, and the elements A are held from accidental displacement by their respective heads rubbing against the top, bottom, or end walls of said casing 48. The respective ends of the casing 48 and the'slideways 54are of semicircular formation so that the conveyers 58 may readily travel around said ends, .and the foremost end of the casing 48 has an opening 53 through which the elements A may be either placed in the conveyers 58, or dispensed therefrom. To facilitate loading of the conveyers 58 with the elements A, for which operation the casing 48 is removed from the handle 2, I provide a pair of slots 55 arranged side by side in the upper wall of the casing 48 to permit insertion of a suitable instrument in the perforations 52 for the purpose of retracting the conveyers 58 step by step in an anticlockwise direction as the elements A are placed in the perforations 52 during their successive exposure at the opening 53.

When the magazine I2 is equipped with more than one conveyer 58, as shown, means are provided in the form of upper and lower trunnions 56 on the rear portion of the magazine to enable it to be shifted from a central position to either side as indicated by dotted lines B, C, Fig. 3, so that either of the conveyers may be selected and positioned to deliver elements A to the magnetic head 4. The upper trunnion 56'is slidably and rotatably mounted in a suitable guide such as the longitudinal slot 58 of a tubular member 68 fixed to the inner surface of the top wall of the handle 2 and provided with a plunger 62 which is pressed backwardly against said upper trunnion 56 by a coil spring 64 and thus yieldably holds the rear end of the magazine I2 against the door 48. The lower trunnion 56 is rotatably and slidably mounted in a suitable guide such as the longitudinal slot 66 of a member 68 fixed to the inner surface of the lower wall of the handle 2. The slots 58 and 66 permit the magazine to be advanced to facilitate withdrawal of the elements A from the magazine by magnetic attraction of the head 4, as will hereinafter appear.

Lateral shifting of the magazine I2 in either direction, is effected by a manually controlled lever I8 provided with a fulcrum 12 mounted in a bearing I4 fixed to the upper wall of the handle 2. The forward end of the lever I8 is provided with a depending lug 76 extending into a groove I8, Fig. 8, formed between a pair of parallel members 88 fixed to the upper wall of the magazine I2. The rear end of the lever I'8 has a stem 82 projecting upwardly through a slot 84, Fig. 9, in the upper wall of the handle 2 and provided with a knob 86 whereby the leverlfl may be shifted to the right'or left, as indicated by dotted lines D and E, Fig. 3, or shifted to the central position as shown in full lines. 'To prevent accidental movement of the lever 18 when occupying any one of its three positions the lower portion of the stem 82- is provided with an enlargement 88 which is pressed upwardly by the resiliency of said lever I8 into any one of the three enlargements 98 of the slot 84.

To bring the heads of the foremost elements A within the magnetic field of receiving head 4 when in the position, I provide means for advancing the magazine I2 against the action of the spring 64 from the position shown by Figs. 1 and 3 to that disclosed by Fig. 2. Said means comprises a detent 92 mounted at one end upon a pivot 94 fixed to the magnetic head 4 and extending into the cavity I8 at a point above the pivot 6. The hook-shaped end of the detent 92 is normally held depressed by a spring 96 for engagement with either one of the shoulders 88 on the forward upper portion of the magazine I2. With the foregoing arrangement it is apparent that when the magazine I2 is shifted laterally to either of the dotted line positions B, C, to select a conveyer 58, and the magnetic head 4 is rocked towards receiving position, the hook-shaped end of the detent 92 will engage the underlying shoulder 98 and draw the magazine I2 forwardly until the head of the foremost element A in the selected conveyer is within the magnetic field of the head 4. As the magazine I2 is drawn forwardly it cooperates with a pawl I84 in advancing the selected conveyer 58 one step in a clockwise direction to carry the foremost element A to the magazine opening 53, through which the element is withdrawn head foremost against the driving face of the head 4 by magnetic attraction. Just before the magnetic end of the head 4 reaches the receiving position it strikes an arm I88 depending from the detent 92 and thus disengages the latter from the underlying shoulder 98, whereupon the magazine I2 is instantly returned by the action of the spring 64 to its rearmost position against the door 48.

As the magazine I2 is returned to its rearmost position it leaves the foremost element A adhering to the magnetic end of the head 4 which is returned to driving position by the spring 34 the instant the thumb-piece 28 of the latch I4 is 'relieved of downward pressure by the operator. The element A adhering to the magnetic head 4 is now ready to be driven into wood or other material. Should the operator inadvertently actuate the latch I4 before driving the element A the latter will be dislodged by a guard I82 from the magnetic head as the latter swings backwardly to receiving position and thus eliminates all danger of the driving face holding two elements at the same time. The guard I82 is fixed to the forward portion of the magazine I2 and is carried thereby into the path of the element A as the magazine I2 is drawn forwardly by the detent 92, as hereinbefore described.

Pawl I84, Figs. 1, 2, and 3, has a hook-shaped terminal which is pressed by a coil spring I86 into one of the underlying perforations 52 of the selected conveyerand thus causes thesame to slip in a clockwise direction upon the associated slideway 54 and carry the foremost element A to the opening 53 for delivery to the magnetic head, as hereinbefore described. The pawl I04 is mounted upon a pivot I88 carried by lugs II8 fixed to the inner surface of the upper wall of the handle 2.

The operation briefiy stated is as follows: The magazine I2 is removed from the handle 2 and the conveyers 50 are moved step by step in an anticlockwise direction, as they are loaded with the elements A. The magazine I2 is then returned to the interior of the handle 2 where it is held by the door 48 and the plunger 62 pressing against the upper trunnion 56. If the magazine I2 is equipped with two conveyers 50 as shown, the conveyer to be used first is selected by shifting the magazine laterally by means of the lever I0 so that the selected conveyer will be approximately in alinement with the magnetic head 4 when the same is rocked to receiving position. When it is desired to remove an element A from the selected conveyer 50 the operator depresses the thumb-piece 20 to disengage the latch I4 from the pin I6, whereupon the magnetic head 4 is rocked to receiving position through the intermediary of the latch I4 and the link 28. As the magnetic head 4 rocks to the position stated it, through the intermediary of the detent 92, draws the magazine I2 forwardly close to the magnetic head 4 as shown by Fig. 2, so that the foremost element A will be carried within the magnetic zone. As the magazine I2 is drawn forwardly the selected conveyer 50 is caused to slip in a clockwise direction by the pawl I04 until the foremost element A clears the lower edge of the opening 53, whereupon said element A is drawn head foremost into contact with the magnetic end of the head 4, Fig. 2. Just as the magazine I2 reaches the end of its forward movement the magnetic head 4, in swinging to receiving position, impinges against the arm I00 and thereby lifts the detent 92 from the underlying shoulder 98. The magazine I2 is then instantly returned by the spring 64 to its rearmost position leaving the foremost element A adhering to the driving face of the magnetic head 4. The spring 34 then returns the magnetic head 4 to driving 7 position, as the operator relieves the thumb-piece of the latch I4 of downward pressure. With a little practice the operation of successively supplying the magnetic head 4 with elements A from the magazine I2 can-be rapidly accomplished so that when desirable a large number of elements may be driven in a short period of time.

When the magazine I2 is returned to its rearmost position as hereinbefore described, its upper wall lifts the pawl I04 out of engagement with the selected conveyer 50, so that when desired the magazine I2 may be shifted laterally in the opposite direction when the companion conveyer 5B is to be selected for delivery of its elements A to the magnetic head 4.

In order to prevent the foremost elements A of both of the conveyers 50 from being simultaneously Withdrawn by the magnetic head 4 when the magazine occupies the central position shown by Fig. 3, the shoulders 88 are spaced apart as shown, so that in the event said magnetic head should be inadvertently swung to receiving position the detent 92 would slide between said shoulders and thus fail to advance the magazine.

From the foregoing description it is apparent that I have provided a magazine hammer em bodying the advantages above pointed out, and while I have shown and described a preferred embodiment of the invention I reserve all rights to such other forms and modifications thereof as properly fall within the spirit and scope of the invention as claimed.

Having thus described my invention, what I claim and desire to secure by Letters Patent, is:

1. A device of the character described comprising a handle, a magnetic head mounted at the forward end of said handle and adapted to alternately swing to receiving and driving positions, a magazine operably carried by the handle and adapted to carry a supply of elements adapted to be driven by said magnetic head, means adapted to swing the magnetic head in position to receive an element from the magazine, and means controlled by movement of the magnetic head for advancing the magazine to delivery position as the magnetic head swings to receiving position.

2. A device of the character described comprising a handle, a magnetic head mounted at the forward end of said handle and adapted to alternately swing to receiving and driving positions, a magazine operably carried by the handle and adapted to carry a supply of elements adapted to be driven by said magnetic head, means adapted to swing the magnetic head in position to receive an element from the magazine, and a detent operably connected to the magnetic head for advancing the magazine to delivery position as the magnetic head swings to receiving position, said detent being arranged in the path of said magnetic head and adapted to be disengaged thereby from the magazine as the latter reaches the end of its forward movement.

3. A device of the character described comprising a handle, a magnetic head mounted at the forward end of said handle and adapted to alternately swing to receiving and driving positions, a magazine operably carried by the handle and adapted to carry a supply of elements adapted to be driven by said magnetic head, means adapted to swing the magnetic head in position to receive an element from the magazine, a detent operably connected to the magnetic head for advancing the magazine to delivery position as the magnetic head swings to receiving position, said detent being arranged in the path of said magnetic head and adapted to be disengaged thereby from the magazine as the latter reaches the end of its forward movement, and means for restoring the magazine to normal position when released by the detent.

4. A device of the character described comprising a handle, a magnetic head mounted at the forward end of said handle and adapted to alternately swing to receiving and driving positions, a

magazine operably carried by the handle and adapted to carry a supply of elements adapted to be driven by said magnetic head, means adapted to swing the magnetic head in position to receive an element from the magazine, a detent operably connected to the magnetic head for advancing the magazine to delivery position as the magnetic head swings to receiving position, said detent being arranged in the path of said magnetic head and adapted to be disengaged thereby from the magazine as the latter reaches the end of its forward movement, and spring means for restoring the magazine to normal position when released by the detent.

5. A device of the character described comprising a handle, a magnetic head mounted at the forward end of said handle and adapted to alternately swing to receiving and driving positions, a magazine operably carried by the handle and adapted to carry a supply of elements adapted to be driven by said magnetic head, means adapted to swing the magnetic head in position to receive an element from the magazine, means controlled by the magnetic head for advancing the magazine to delivery position as the magnetic head swings to receiving position, and a guard on the maga zine for dislodging any element that may be adhering to the magnetic head as the same swings to receiving position.

6. A device of the character described comprising a hollow handle, a door hinged to the rear end of the hollow handle, means for securing said door in closed position, a magnetic head operably mounted onsaid handle, a magazine in the handle adapted to carry a supply of elements adapted to be driven by the magnetic head and provided with an opening through which the elements may be delivered one by one, and means adapted to swing said magnetic head close to said opening to receive an element.

7. A device of the character described comprising a hollow handle, a magnetic head carried by said handle and adapted to alternately swing to receiving and driving positions, a magazine in the handle for holding a supply of elements adapted to be driven by the magnetic head, said magazine having a delivery opening through which the foremost element may be withdrawn when the magnetic head is in receiving position, link-means for actuating the magnetic head, and latch-means adapted to secure the magnetic head in driving position or coact with said link means in swinging the magnetic head to receiving position.

8. A device of the character described comprising a hollow handle, a magnetic head carried by said handle and adapted to alternately swing to receiving and driving positions, a magazine in the handle for holding a supply of elements adapted to be driven by the magnetic head, said magazine having a delivery opening through which the foremost element may be withdrawn when the magnetic head is in receiving position, link-means adapted to swing the magnetic head to receiving position, resilient means for swinging the magnetic head to driving position, and latch-means adapted to secure the magnetic head in driving position or coact with said link-means in swinging the magnetic head to receiving position.

9. A device of the character described comprising a hollow handle, a magnetic head carried by said handle and adapted to alternately swing to receiving and driving positions, a magazine in the handle for holding a supply of elements adapted to be driven by the magnetic head, said magazine having a delivery opening through which the foremost element may be withdrawn when the magnetic head is in receiving position, linkmeans adapted to swing the magnetic head to receiving position, resilient means for swinging the magnetic head to driving position, latchmeans adapted to secure the magnetic head in driving position or coact with said link-means in swinging the magnetic head to receiving position, and resilient means adapted to yieldably hold said latch-means in position for securing the magnetic head in driving position.

10. A device of the character described comprising a hammer having a magnetic head, a handle on which said magnetic head is mounted to alternately swing to receiving and driving positions, an endless conveyer for holding a supply of elements adapted to be driven by the magnetic head, a magazine operably carried by the handle and in which said endless conveyer is arranged to travel in a circuit, means controlled by the movement of the magnetic head for advancing the magazine towards said magnetic head as the latter swings to receiving position, and means cooperating with the magazine so as to move the endless conveyer one step for delivery of the foremost element to the magnetic head as the same reaches receiving position.

11. A device of the character described comprising a hammer having a magnetic head, a

handle on which said magnetic head is mounted to alternately swing to receiving and driving positions, an endless conveyer for holding a supply of elements adapted to be driven by the magnetic head, a magazine operably carried by the handle and in which said endless conveyer is arranged to travel in a circuit, means controlled by the movement of the magnetic head for advancing the magazine towards said magnetic head as the latter swings to receiving position, means for cooperating with the magazine so as to move the endless conveyer one step for delivery of the foremost element to the magnetic head as the same reaches receiving position, means for retracting the magazine on delivery of the foremost element, and means for restoring the hammer-head to driving position.

12. A device of the character described comprising a hammer having a magnetic head, a handle on which said magnetic head is mounted to alternately swing to receiving and driving positions, an endless conveyer for holding a supply of elements adapted to be driven by the magnetic head, a magazine operably carried by the handle and in which said endless conveyer is arranged to travel in a circuit, means controlled by the movement of the magnetic head for advancing the magazine towards said magnetic head as the latter swings to receiving position, and a pawl adapted to engage the endless conveyer and cooperate with the magazine so as to move said endless conveyer one step for delivery of the foremost element to the magnetic head on reaching receiving position.

13. A device of the character described comprising a hammer having a magnetic head, a handle on which said magnetic head is mounted to alternately swing to receiving and driving positions, an endless conveyer for holding a supply of elements adapted to be driven by the magnetic head, a magazine operably carried by the handle and in which said endless conveyer is ar ranged to travel in a circuit, means controlled by the movement of the magnetic head for advancing the magazine towards said magnetic head as the latter swings to receiving position, a pawl operably connected to the handle adapted to engage the endless conveyer and cooperate with the magazine so as to move said endless conveyer one step for delivery of an element to the magnetic head on reaching receiving position, and spring means for yieldably holding said pawl in engagement with the endless conveyer.

14. A device of the character described comprising a hammer having a magnetic head, a handle on which said magnetic head is mounted to alternately swing to receiving and driving positions, an endless conveyer for holding a supply of elements adapted to be driven by the magnetic head, a magazine operably carried by the handle and in which said endless conveyer is arranged to travel in a circuit, means controlled by the movement of themagnetic head for advancing the magazine towards said magnetic head as the latter swings to receiving position, a pawl adapted to engage the endless conveyer and cooperate with the magazine so as to move said endless conveyer one step for delivery of the foremost element to the magnetic head on reaching the receiving position, means for retracting the magazine, and means for swinging the magnetic head to driving position.

15. A device of the character described comprising a hammer having a magnetic head, a handle on which said magnetic head is mounted to alternately swing to receiving and driving positions, an endless conveyer for holding a supply of elements adapted to be driven by the magnetic head, a magazine operably carried by the handle and in which said endless conveyer is arranged to travel in a circuit, means controlled by the movement of the magnetic head for advancing the magazine towards said magnetic head as the latter swings to receiving position, a pawl adapted to engage the endless conveyer and cooperate with the magazine so as to move said endless conveyer one step for delivery of the foremost element to the magnetic head on reaching receiving position, means for retracting the magazine, means on the magazine for disengaging the pawl from the endless conveyer as the magazine is retracted, and means for swinging the magnetic head to driving position.

16. A device of the character described comprising a hammer having a magnetic head, a hollow handle on which said magnetic head is mounted to alternately swing to receiving and driving positions, a pair of endless conveyers arranged side by side for holding a supply of elements adapted to be driven by the magnetic head, a magazine laterally shiftable in the handle and in which said endless conveyers are arranged to travel in a circuit, means for shifting the magazine laterally so that either of the endless conveyers may be selected for delivery of elements to the magnetic head, and means including the magnetic head and the magazine for moving the selected endless conveyer one step for delivery of the foremost element to said magnetic head when in receiving position.

17. A device of the character described comprising a hammer having a magnetic head, a hollow handle on which said magnetic head is mounted to alternately swing to receiving and driving positions, a pair of endless conveyers arranged side by side for holding a supply of elements adapted to be driven by the magnetic head, a magazine laterally shiftable in the handle and in which said endless conveyers are arranged to travel in a circuit, a lever for shifting the magazine laterally so that either of the endless conveyers may be selected for delivery of elements to the magnetic head, and means including the magnetic head and the magazine for moving the selected endless conveyer one step for delivery of the foremost element to said magnetic head when in receiving position.

18. A device of the character described comprising a hammer having a magnetic head, a hollow handle on which said magnetic head is mounted to alternately swing to receiving and driving positions, a pair of endless conveyers arranged side by side for holding a supply of elements adapted to be driven by the magnetic head, a magazine laterally shiftable in the handle and in which said endless conveyers are arranged to travel in a circuit, a lever pivoted in the handle and adapted to shift the magazine laterally so that either of the endless conveyers may be selected for delivery of elements to the magnetic head, means in the handle and on said lever for holding the latter in any of its pivoted positions, and means including the magnetic head and the magazine for moving the selected endless conveyer one step for delivery of the foremost element to said magnetic head when in receiving position.

19. A device of the character described comprising a hammer having a magnetic head, a hollow handle on which said magnetic head is mounted to alternately swing to receiving and driving positions, a pair of endless conveyers arranged side by side for holding a supply of elements adapted to be driven by the magnetic head, a magazine in the handle and in which said endless conveyers are arranged to travel in a circuit, trunnions on the rear portion of said magazine to permit lateral shifting thereof, means for shifting the magazine laterally so that either of the endless conveyers may be selected for delivery of elements to the magnetic head, guide means in which said trunnions are slidably mounted to permit forward and backward movement of the magazine, means controlled by the movement of the magnetic head for advancing the magazine towards said magnetic head as the latter swings to receiving position, and means cooperating with the magazine for moving the selected endless conveyer one step for delivery of the foremost element to said magnetic head when in receiving position.

20. A device of the character described comprising a hammer having a magnetic head, a hollow handle on which said magnetic head is mounted to alternately swing to receiving and driving positions, a pair of endless conveyers arranged side by side for holding a supply of elements adapted to be driven by the magnetic head, a magazine in the handle and in which said endless conveyers are arranged to travel in a curcuit, trunnions on the rear portion of said magazine to permit lateral shifting thereof, means for shifting the magazine laterally so that either of the endless conveyers may be selected for delivery of elements to the magnetic head, guide means in which said trunnions are slidably mounted to permit forward and backward movement of the magazine, means controlled by the movement of the magnetic head for advancing the magazine towards said magnetic head as the latter swings to receiving position, means cooperating with the magazine for moving the selected endless conveyer one step for delivery of the foremost element to said magnetic head when in receiving position, and means for retracting the magazine.

SAMUEL M. COFFMAN. 

